CN212759562U - Screening device for cylindrical screen - Google Patents

Abstract

The embodiment of the utility model discloses a cylindrical screen screening device, which comprises a screen drum, wherein a rotating shaft is arranged in the screen drum, and a refining blade is arranged on the rotating shaft; wherein the screen drum is in driving connection with a first rotating motor; the rotating shaft is in driving connection with the second rotating motor; like this, when using, through first rotation motor drive sieve section of thick bamboo rotates, the second rotates motor drive the pivot drives the refining blade and rotates, then carry grain extremely in the sieve section of thick bamboo, according to actual needs, adjust sieve section of thick bamboo with the rotational speed of pivot changes grain and is in the flow velocity of a sieve section of thick bamboo improves the sifter utilization ratio, has also solved the problem that current sieve section of thick bamboo front portion grain is piled up, the few grain of back section of thick bamboo screen simultaneously.

Description

Screening device for cylindrical screen

Technical Field

The utility model relates to a sieving mechanism especially relates to a drum sieve sieving mechanism.

Background

In the grain production process, impurities such as soil, gravels, straws and the like with different sizes in grains need to be cleaned, so that the impurities in the grains are reduced. At present, there are many kinds of grain cleaning equipment at home and abroad, such as a cylindrical primary cleaning sieve, a vibration cleaning sieve, a plane rotary sieve, a stone remover and the like. However, when these cleaning devices are used, especially when the cylindrical screen is used, the grains conveyed into the screen cylinder are easily accumulated at the feed port and the front half section of the screen cylinder, so that the screen surfaces of other parts of the screen cylinder are in an empty state, which causes the problems of low utilization rate of the screen surfaces in the screen cylinder and low screening rate of the device. Therefore, the key points of development are to improve the sieving rate of the sieve surface and increase the area of the sieve surface.

SUMMERY OF THE UTILITY MODEL

For solving above technical problem, the embodiment of the utility model provides a drum sieve sieving mechanism can be through driving a sieve section of thick bamboo and pivot respectively for the effect through refining blade in the pivot makes grain when screening, can evenly distributed in a sieve section of thick bamboo on the sifting surface, improves the utilization ratio of sifting surface in a sieve section of thick bamboo, thereby improves the speed to grain screening.

In order to achieve the above purpose, the embodiment of the present invention provides a technical solution that:

the embodiment of the utility model provides a cylindrical screen screening device, which comprises a screen drum, wherein a rotating shaft is arranged in the screen drum, and a refining blade is arranged on the rotating shaft; wherein the screen drum is in driving connection with a first rotating motor; the rotating shaft is in driving connection with the second rotating motor.

The embodiment of the utility model provides an in, the terminal surface of sieve section of thick bamboo high-end department sets up the grain import, the terminal surface of sieve section of thick bamboo low-end department sets up the impurity export.

In the embodiment of the present invention, the inclination angle of the screen cylinder with respect to the reference horizontal plane is 3 ° to 10 °.

In the embodiment of the present invention, the refining blade is disposed on the rotating shaft located at the high end of the screen drum.

The embodiment of the utility model provides an in, the top of a sieve section of thick bamboo sets up the feeding hopper, the discharge gate of feeding hopper with the grain import intercommunication of a sieve section of thick bamboo.

In the embodiment of the utility model, there are two screen drums, and the two screen drums are arranged side by side;

and the discharge port of the feeding hopper is respectively communicated with the grain inlets of the two screen drums through the material distribution plate.

The embodiment of the utility model provides an in, the impurity export below of a sieve section of thick bamboo sets up thick miscellaneous collection device.

In the embodiment of the utility model, a vibrating screen is arranged below the screen drum, and the screen plate of the vibrating screen is arranged obliquely;

wherein, a grain collecting device is arranged below the lower end of the sieve plate of the vibrating sieve;

and a fine impurity collecting device is arranged below a sieve plate of the vibrating sieve.

The embodiment of the utility model provides an in, still set up on the sieve of shale shaker and lead the grain board, lead the grain board to the sieve slope setting of shale shaker.

In the embodiment of the utility model, the low side of leading the grain board is close to the sieve upper end setting of shale shaker.

The embodiment of the utility model provides a cylindrical screen screening device, which comprises a screen drum, wherein a rotating shaft is arranged in the screen drum, and a refining blade is arranged on the rotating shaft; wherein the screen drum is in driving connection with a first rotating motor; the rotating shaft is in driving connection with the second rotating motor; like this, when using, through first rotation motor drive sieve section of thick bamboo rotates, the second rotates motor drive the pivot drives the refining blade and rotates, then carry grain extremely in the sieve section of thick bamboo, according to actual needs, adjust sieve section of thick bamboo with the rotational speed of pivot changes grain and is in the flow velocity of a sieve section of thick bamboo improves the sifter utilization ratio, has also solved the problem that current sieve section of thick bamboo front portion grain is piled up, the few grain of back section of thick bamboo screen simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the inside of a screen drum according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a feeding hopper mounted on a screen drum according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a feeding hopper provided in an embodiment of the present invention;

fig. 4 is a schematic perspective view of a cylindrical screen screening device provided in an embodiment of the present invention;

fig. 5 is a front view of the cylindrical screen screening device provided by the embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment of the utility model provides a drum screen screening device, as shown in fig. 1, comprising a screen drum 1, wherein the screen drum 1 is obliquely arranged, a rotating shaft 2 is arranged in the screen drum 1, and a refining blade 21 is arranged on the rotating shaft 2; wherein, the screen drum 1 is in driving connection with a first rotating motor 3; the rotating shaft 2 is in driving connection with a second rotating motor 4.

Here, the screen cylinder 1 may be cylindrical, the screen cylinder 1 is disposed obliquely, and two end faces of the screen cylinder 1 are respectively provided with an opening; an end face opening at the high end of the screen cylinder 1 is a grain inlet, and an end face opening at the low end of the screen cylinder 1 is an impurity outlet; the body of the screen drum 1 is composed of a drum frame and a screen installed on the drum frame, the caliber of a screen opening on the screen is slightly larger than the granularity of grains to be screened, and the screen opening is sequentially reduced from a grain inlet to an impurity outlet. The screen drum 1 is also in driving connection with the first rotating motor 3, i.e. the screen drum 1 is rotated by the action of the first rotating motor 3. More specifically, as shown in fig. 1, one end of the screen cylinder 1 is fixed by a chain wheel structure with a large number of teeth, so that the screen cylinder 1 can rotate relative to the chain wheel, and the other end of the screen cylinder 1 is connected with the first rotating motor 3 through chain transmission. Like this, when carrying out the screening, grain enters into through the grain import in the sieve section of thick bamboo 1 to pass through sieve on the sieve section of thick bamboo 1 screens, wherein, the grain after the screening passes through the sieve screen sieves out, and the granularity can not pass through the impurity of sieve net mouth is then passed through impurity export is discharged.

The rotating shaft 2 is arranged in the screen cylinder 1, the rotating shaft 2 is arranged along the axial direction of the screen cylinder 1, and preferably, the rotating shaft 2 is arranged along the central axis of the screen cylinder 1; the rotating shaft 2 is provided with the refining blade 21, and the refining blade 21 can be a screw blade. The rotating shaft 2 is in driving connection with the second rotating motor 4, that is, the second rotating motor 4 drives the rotating shaft 2 to rotate and drives the refining blades 21 on the rotating shaft 2 to rotate, wherein a connection manner in which the second rotating motor 4 drives the rotating shaft 2 to rotate is common knowledge to those skilled in the art, and therefore, details are not repeated here.

When the sieve drum is used, when grain to be screened is conveyed to the inside of the sieve drum 1 from the grain inlet of the sieve drum 1, the rotation of the sieve drum 1 is obliquely arranged, so that the grain can move from the high end to the low end of the sieve drum 1 under the action of gravity of the grain entering the inside of the sieve drum 1, impurities with granularity larger than the mesh opening of the sieve are left in the sieve drum 1 under the action of the sieve mesh on the sieve drum 1 during the movement, and are finally discharged through the impurity outlet under the action of the obliquely arranged rotation of the sieve drum 1 and the material homogenizing blades, and the grain to be screened is screened out through the sieve mesh.

However, in order to ensure the screening efficiency, the inclination angle of the screen cylinder 1 is generally smaller, so that the effect of improving the flow speed of the grains in the screen cylinder 1 is not good by only depending on the gravity action of the grains and the rotation of the screen cylinder 1, and the rotation of the refining blade 21 is driven by the rotating shaft 2, so that the grains can flow to the lower end of the screen cylinder 1 in time in the conveying process, and thus, when the grains are screened, the grains in the screen cylinder 1 are distributed more uniformly in the front and at the back of the screen cylinder, the problem of grain accumulation at the grain inlet at the high end of the screen cylinder 1 is avoided, the utilization rate of the grain surface is improved, and the problems of grain accumulation at the front part (i.e. the high end) and small screen surface at the back part (i.e. the low end) of the existing cylindrical screen are solved.

Further, in the embodiment of the present invention, as shown in fig. 1, the inclination angle of the screen cylinder 1 with respect to the reference horizontal plane is 3 ° to 10 °.

Here, in order to ensure the efficiency of the grain when the grain is sieved and avoid the problem that the grain is discharged from the impurity outlet without being sieved due to the fact that the inclination angle of the sieve cylinder 1 is too large, the inclination angle of the sieve cylinder 1 needs to be set, and meanwhile, the inclination angle of the sieve cylinder 1 can be small when the sieve cylinder 1 is set because the refining blade 21 is arranged in the sieve cylinder 1, so that the inclination angle of the sieve cylinder 1 relative to a reference horizontal plane is set to be 3-10 °. Wherein the reference horizontal plane refers to an angle at which the screen cylinder 1 is inclined upward with respect to the horizontal.

Further, in the embodiment of the present invention, as shown in fig. 1, the refining blade 21 is disposed on the rotating shaft 2 at the high end of the screen cylinder 1.

Here, the grain is uniformly distributed in the screen cylinder 1 when screening is performed, because the refining blade 21 is used for conveying a part of the grain at the high end of the screen cylinder 1 downwards to the low end of the screen cylinder 1. However, in order to avoid the grain moving speed in the screen cylinder 1 being too fast, the refining blade 21 is generally only arranged on the rotating shaft 2 at the high end of the screen cylinder 1, so that the grain accumulated at the grain inlet of the screen cylinder 1 can be rapidly guided into the middle area in the screen cylinder 1, and then the grain is uniformly distributed into the screen cylinder 1 by the gravity of the grain. Specifically, one end of the refining blade 21 may be located at the high end of the screen cylinder 1, and the other end of the refining blade 21 may be located at the middle of the screen cylinder 1.

Further, in the embodiment of the present invention, as shown in fig. 2, 3 and 4, a feeding hopper 5 is disposed above the screen cylinder 1, and a discharge port of the feeding hopper 5 is communicated with the grain inlet of the screen cylinder 1.

Two screen drums 1 are arranged, and the two screen drums 1 are arranged side by side; the discharge hole of the feeding hopper 5 is respectively communicated with the grain inlets of the two screen drums 1 through a material distributing plate 51.

And a coarse impurity collecting device 6 is arranged below an impurity outlet of the screen cylinder 1.

Here, as shown in fig. 4, there are two screen cylinders 1, and two screen cylinders 1 are arranged side by side, wherein, each screen cylinder 1 is internally provided with a rotating shaft 2 and a refining blade, two upper end faces of the screen cylinders 1 are respectively provided with a grain inlet, two lower end faces of the screen cylinders 1 are provided with an impurity outlet, a coarse impurity collecting device 6 is arranged below the impurity outlet, specifically, the coarse impurity collecting device 6 can comprise a collecting box body, and a conveying auger used for moving out impurities is arranged at the bottom of the collecting box body.

As shown in fig. 2, the feeding hopper 5 is arranged above the grain inlet, the feeding hopper 5 includes a casing, a feeding port is arranged at the upper end of the casing, a discharging port is arranged at the lower end of the casing, the casing is provided with a material distributing plate 51, the material distributing plate 51 divides the discharging port into two outlets, and each outlet is respectively connected with the inlets of the two screen cylinders 1 in a one-to-one correspondence.

In the using process, under the condition of equal space volume, the screen mesh area of the two small-diameter cylinder screening devices which are arranged in parallel is larger than that of the large-diameter cylinder screening device with the same width, specifically, when two cylinder screens with the diameter of phi 900 are compared with one cylinder screen with the diameter of phi 1800, the screen mesh area of the two small cylinders can be improved by 39% when the grain layer thickness is 100 mm.

Further, in the embodiment of the present invention, as shown in fig. 5, a vibrating screen 7 is disposed below the screen drum 1, and a screen plate of the vibrating screen 7 is disposed in an inclined manner; wherein, a grain collecting device is arranged below the lower end of the sieve plate of the vibrating sieve 7; and a fine impurity collecting device 9 is arranged below the sieve plate of the vibrating sieve 7.

And a sieve plate of the vibrating sieve 7 is also provided with a grain guide plate 8, and the grain guide plate 8 is obliquely arranged towards the sieve plate of the vibrating sieve 7.

The lower end of the grain guide plate 8 is arranged close to the upper end of the sieve plate of the vibrating sieve 7.

Here, after the grains are coarsely screened by the screen drum 1, the grains need to be finely screened, so a vibrating screen 7 is arranged below the screen drum 1, the vibrating screen 7 comprises a screen plate and a vibrator, and the vibrator is arranged below the screen plate through a bracket; the sieve slope sets up, and is followed when grain falls into on the sieve section of thick bamboo 1 when on the sieve, through the effect of vibrator for the sieve vibration, wherein, the less impurity of granularity passes through the sieve falls into to be located the sieve below in the fine impurity collection device 9, and the grain that is not screened then follows the sieve rolls down to in the grain collection device.

In order to ensure that grains are sufficiently screened on the sieve plate, the grain guide plate 8 is arranged above the sieve plate, so that the grains are prevented from directly falling to the lower end of the sieve plate when falling from the sieve cylinder 1. Specifically, the material guide plate is arranged above the sieve plate, the grain guide plate 8 is arranged in an inclined manner towards the sieve plate of the vibrating sieve 7, and the lower end of the grain guide plate 8 is arranged close to the upper end of the sieve plate of the vibrating sieve 7.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims (10)

1. The screening device of the cylindrical screen is characterized by comprising a screen cylinder (1), wherein a rotating shaft (2) is arranged in the screen cylinder (1), and a material refining blade (21) is arranged on the rotating shaft (2); wherein the screen drum (1) is in driving connection with a first rotating motor (3); the rotating shaft (2) is in driving connection with the second rotating motor (4).

2. A cylindrical screen screening device according to claim 1, characterized in that the end surface of the screen cylinder (1) at the high end is provided with a grain inlet, and the end surface of the screen cylinder (1) at the low end is provided with an impurity outlet.

3. A cylindrical screen screening apparatus as claimed in claim 1, wherein the screen cylinder (1) is inclined at an angle of 3 ° to 10 ° to a reference horizontal plane.

4. A cylindrical screen screening device according to claim 1, characterized in that the refining blades (21) are arranged on the rotor shaft (2) at the high end of the screen cylinder (1).

5. The cylindrical screen screening device as claimed in claim 1, wherein a feeding hopper (5) is arranged above the screen cylinder (1), and a discharge port of the feeding hopper (5) is communicated with a grain inlet of the screen cylinder (1).

6. A cylindrical screen screening device according to claim 5, characterized in that there are two of said screen cylinders (1), and that two of said screen cylinders (1) are arranged side by side;

and the discharge hole of the feeding hopper (5) is respectively communicated with grain inlets of the two screen cylinders (1) through a material distributing plate (51).

7. A cylindrical screen screening device according to claim 1, characterized in that a coarse impurity collecting device (6) is arranged below the impurity outlet of the screen cylinder (1).

8. A cylindrical screen screening device according to claim 1, characterized in that a vibrating screen (7) is arranged below the screen cylinder (1), and the screen plate of the vibrating screen (7) is arranged obliquely;

wherein, a grain collecting device is arranged below the lower end of the sieve plate of the vibrating sieve (7);

and a fine impurity collecting device (9) is arranged below the sieve plate of the vibrating sieve (7).

9. The screening device of the cylindrical screen according to claim 8, wherein a grain guide plate (8) is further arranged on the screen plate of the vibrating screen (7), and the grain guide plate (8) is obliquely arranged towards the screen plate of the vibrating screen (7).

10. The screening device of the cylindrical screen as claimed in claim 9, wherein the lower end of the grain guide plate (8) is arranged close to the upper end of the screen plate of the vibrating screen (7).

Images